Pick the right combination of terms which has no fossil fuel.

Opposition to the construction of large dams is due to

Khadins, Bundhis, Ahars and Kattas are ancient structures that are examples for

Select the eco-friendly activity among the following

It is important to make small check dams across the flooded gullies because they

i. hold water for irrigation

ii. hold water and prevent soil erosion

iii. recharge ground water

iv. hold water permanently